3v4l.org

run code in 300+ PHP versions simultaneously
<?php $utf8_str = 'abcd \xef efgh'; echo iconv_substr( $utf8_str , 0 , 8 , 'UTF-8' ); exit(0);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.70.0060.00918.18
8.3.60.0120.00616.63
8.3.50.0130.00817.31
8.3.40.0070.01418.66
8.3.30.0080.00618.50
8.3.20.0050.00318.78
8.3.10.0000.00820.48
8.3.00.0030.00519.50
8.2.180.0100.01016.50
8.2.170.0060.01222.96
8.2.160.0100.01021.07
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0050.00226.16
8.2.120.0040.00419.10
8.2.110.0030.00620.92
8.2.100.0040.00817.91
8.2.90.0000.00919.30
8.2.80.0040.00419.30
8.2.70.0040.00417.75
8.2.60.0030.00617.93
8.2.50.0040.00419.36
8.2.40.0040.00418.09
8.2.30.0080.00018.05
8.2.20.0050.00217.78
8.2.10.0040.00417.71
8.2.00.0000.00717.79
8.1.280.0120.00325.92
8.1.270.0000.00724.66
8.1.260.0040.00426.35
8.1.250.0000.00728.09
8.1.240.0040.00822.59
8.1.230.0060.00620.98
8.1.220.0000.00817.75
8.1.210.0030.00618.90
8.1.200.0070.00317.35
8.1.190.0000.00817.53
8.1.180.0030.00618.10
8.1.170.0000.00818.71
8.1.160.0070.00018.88
8.1.150.0040.00418.53
8.1.140.0040.00417.30
8.1.130.0000.00717.73
8.1.120.0000.00817.43
8.1.110.0000.00717.29
8.1.100.0000.00717.28
8.1.90.0000.00717.32
8.1.80.0030.00417.31
8.1.70.0050.00217.30
8.1.60.0080.00017.50
8.1.50.0060.00317.54
8.1.40.0000.00717.42
8.1.30.0050.00317.57
8.1.20.0040.00417.68
8.1.10.0040.00417.41
8.1.00.0030.00517.42
8.0.300.0000.00819.98
8.0.290.0030.00616.75
8.0.280.0000.00718.50
8.0.270.0000.00717.13
8.0.260.0060.00016.86
8.0.250.0000.00717.05
8.0.240.0030.00416.86
8.0.230.0030.00316.91
8.0.220.0070.00016.77
8.0.210.0000.00816.80
8.0.200.0040.00416.96
8.0.190.0000.00716.87
8.0.180.0000.00716.81
8.0.170.0000.00816.79
8.0.160.0000.00716.86
8.0.150.0000.00816.76
8.0.140.0040.00716.69
8.0.130.0000.00513.27
8.0.120.0000.01016.89
8.0.110.0000.00916.84
8.0.100.0030.00617.02
8.0.90.0040.00416.93
8.0.80.0100.01416.98
8.0.70.0000.00916.83
8.0.60.0000.01016.88
8.0.50.0040.00416.89
8.0.30.0120.00917.12
8.0.20.0120.01017.12
8.0.10.0030.00617.04
8.0.00.0130.01216.96
7.4.330.0000.00512.95
7.4.320.0060.00016.57
7.4.300.0000.00616.45
7.4.290.0030.00316.41
7.4.280.0030.00616.44
7.4.270.0030.00316.53
7.4.260.0030.00313.28
7.4.250.0030.00616.69
7.4.240.0040.00416.57
7.4.230.0030.00616.49
7.4.220.0090.02116.61
7.4.210.0070.01416.73
7.4.200.0040.00416.46
7.4.190.0000.00816.68
7.4.160.0070.01116.61
7.4.150.0100.01016.66
7.4.140.0150.00716.55
7.4.130.0070.01216.57
7.4.120.0110.01416.58
7.4.110.0120.01416.70
7.4.100.0070.01316.46
7.4.90.0090.01216.48
7.4.80.0120.01619.39
7.4.70.0040.01516.38
7.4.60.0120.00616.43
7.4.50.0100.00016.81
7.4.40.0100.00716.43
7.4.30.0070.01116.64
7.4.00.0080.01214.88
7.3.330.0060.00013.10
7.3.320.0060.00013.24
7.3.310.0000.00816.33
7.3.300.0060.00316.29
7.3.290.0130.00316.43
7.3.280.0100.01216.30
7.3.270.0150.00716.44
7.3.260.0140.01416.61
7.3.250.0110.00916.51
7.3.240.0060.01816.40
7.3.230.0070.01316.38
7.3.210.0100.01016.30
7.3.200.0070.01416.31
7.3.190.0060.01316.41
7.3.180.0000.02016.36
7.3.170.0060.01316.47
7.3.160.0120.01216.51
7.3.120.0000.01714.95
7.3.10.0100.00716.66
7.3.00.0000.01516.55
7.2.330.0100.01016.76
7.2.320.0080.01316.70
7.2.310.0070.01416.86
7.2.300.0070.01416.75
7.2.290.0100.01016.68
7.2.130.0000.01716.90
7.2.120.0140.00016.94
7.2.110.0000.01916.92
7.2.100.0000.01617.00
7.2.90.0030.01417.08
7.2.80.0110.00816.63
7.2.70.0000.01216.75
7.2.60.0070.01017.12
7.2.50.0030.01316.88
7.2.40.0070.01016.98
7.2.30.0040.00816.96
7.2.20.0080.00816.62
7.2.10.0070.01317.07
7.2.00.0020.01618.19
7.1.250.0060.00616.05
7.1.200.0120.00415.52
7.1.100.0000.01418.30
7.1.70.0000.00917.12
7.1.60.0030.02419.40
7.1.50.0100.00317.23
7.1.00.0030.06722.69
7.0.200.0110.00715.18
7.0.140.0070.07322.25
7.0.120.0000.06722.18
7.0.60.0070.08320.01
7.0.50.0070.04017.86
7.0.40.0030.09020.29
7.0.30.0270.05720.33
7.0.20.0300.08320.33
7.0.10.0270.08020.49
7.0.00.0000.05020.32
5.6.280.0030.07321.22
5.6.210.0100.08020.46
5.6.200.0070.04318.32
5.6.190.0000.05320.58
5.6.180.0170.07720.54
5.6.170.0330.07320.57
5.6.160.0100.08720.66
5.6.150.0100.03718.38
5.6.140.0130.07318.33
5.6.130.0170.08018.25
5.6.120.0100.05721.25
5.6.110.0170.05321.16
5.6.100.0030.04721.14
5.6.90.0170.07321.27
5.6.80.0030.08320.56
5.5.350.0170.08720.42
5.5.340.0200.04318.10
5.5.330.0100.08720.29
5.5.320.0000.05720.31
5.5.310.0330.08020.36
5.5.300.0100.06318.14
5.5.290.0030.04718.12
5.5.280.0030.05021.00
5.5.270.0130.05320.99
5.5.260.0030.05720.90
5.5.250.0070.08020.59
5.5.240.0030.08320.47
5.4.450.0000.04319.50
5.4.440.0070.03719.41
5.4.430.0130.03019.57
5.4.420.0030.04019.57
5.4.410.0130.03019.55
5.4.400.0100.03319.35
5.4.390.0000.04019.32
5.4.380.0070.03318.98
5.4.370.0070.04019.25
5.4.360.0100.04019.31
5.4.350.0000.04019.32
5.4.340.0070.03719.32
5.4.320.0030.04019.32
5.4.310.0070.04319.34
5.4.300.0100.07318.99
5.4.290.0000.07719.24
5.4.280.0030.04019.31
5.4.270.0030.07019.35
5.4.260.0100.05719.31
5.4.250.0030.06019.23
5.4.240.0030.07719.30
5.4.230.0030.05018.97
5.4.220.0100.06318.95
5.4.210.0030.07019.23
5.4.200.0070.07719.30
5.4.190.0030.08019.25
5.4.180.0100.04318.95
5.4.170.0130.06718.94
5.4.160.0070.04319.32
5.4.150.0000.05018.95
5.4.140.0170.03716.46
5.4.130.0030.05016.50
5.4.120.0000.04716.53
5.4.110.0100.07016.49
5.4.100.0070.03716.52
5.4.90.0100.03316.55
5.4.80.0100.06316.60
5.4.70.0030.08016.52
5.4.60.0100.06316.46
5.4.50.0000.06016.55
5.4.40.0070.04016.41
5.4.30.0030.08016.47
5.4.20.0100.03316.59
5.4.10.0030.06316.55
5.4.00.0100.05315.99
5.3.290.0000.04014.77
5.3.280.0130.06714.68
5.3.270.0030.05014.70
5.3.260.0000.08314.64
5.3.250.0000.04714.71
5.3.240.0170.07014.73
5.3.230.0030.04014.54
5.3.220.0100.07314.62
5.3.210.0070.04314.60
5.3.200.0200.06714.63
5.3.190.0070.03714.60
5.3.180.0070.07714.54
5.3.170.0030.05314.82
5.3.160.0100.06714.70
5.3.150.0030.06014.64
5.3.140.0000.06314.66
5.3.130.0100.05314.52
5.3.120.0070.06314.59
5.3.110.0070.08314.59
5.3.100.0100.04014.14
5.3.90.0000.04314.10
5.3.80.0100.04014.11
5.3.70.0070.08314.26
5.3.60.0130.05314.11
5.3.50.0100.06014.21
5.3.40.0030.07714.04
5.3.30.0070.07313.90
5.3.20.0070.05713.77
5.3.10.0170.07013.75
5.3.00.0030.05313.75
5.2.170.0030.03311.38
5.2.160.0130.05011.28
5.2.150.0100.06711.23
5.2.140.0000.06711.26
5.2.130.0000.06711.24
5.2.120.0070.06011.14
5.2.110.0070.05711.14
5.2.100.0070.06011.07
5.2.90.0070.05711.09
5.2.80.0100.03011.12
5.2.70.0100.05711.23
5.2.60.0000.04711.19
5.2.50.0070.06011.06
5.2.40.0070.06711.05
5.2.30.0070.06311.06
5.2.20.0000.04011.05
5.2.10.0170.05011.06
5.2.00.0000.04310.90
5.1.60.0000.05010.14
5.1.50.0030.0579.99
5.1.40.0030.02710.10
5.1.30.0000.03010.52
5.1.20.0030.04010.51
5.1.10.0070.04010.22
5.1.00.0000.06010.13
5.0.50.0030.0408.70
5.0.40.0130.0208.56
5.0.30.0000.0638.32
5.0.20.0000.0238.32
5.0.10.0030.0338.46
5.0.00.0000.0438.37
4.4.90.0000.0208.16
4.4.80.0030.0138.16
4.4.70.0100.0308.16
4.4.60.0000.0308.16
4.4.50.0030.0338.16
4.4.40.0070.0508.16
4.4.30.0100.0178.16
4.4.20.0070.0138.16
4.4.10.0030.0338.16
4.4.00.0000.0538.16
4.3.110.0000.0238.16
4.3.100.0070.0278.16
4.3.90.0000.0338.16
4.3.80.0000.0278.16
4.3.70.0000.0178.16
4.3.60.0000.0178.16
4.3.50.0000.0238.16
4.3.40.0030.0278.16
4.3.30.0000.0308.16
4.3.20.0000.0378.16
4.3.10.0000.0238.16
4.3.00.0000.0308.16

preferences:
40.94 ms | 401 KiB | 5 Q